Lateral distribution on charged particles in EAS

Lateral distribution of charged particles which allow for the finiteness of energy gamma-quanta, the inhomogeneity of the atmosphere and the experimental selection of EAS are needed to interpret experimental data. The effects of finiteness of energy of gamma-quanta which produce the partial electron-photon cascades were considered by substituting K R sub m instead of R sub m in NKG approximation where K was found to be 0.56 from comparison with the experimental data. New results on the lateral distribution of electrons in the partial cascades from gamma-quanta were obtained. It is shown that the coefficient K can be regarded as a constant. The last approximation of K was found to be most adequate when compared with the experimental data. The inhomogeneity of the atmosphere, muons and experimental selection are considered. The calculation of Ne are extended from 100,000 to 10 million for sea level and for Akeno level

On the upper limit of antinuclei content in cosmic rays

Upper limit of antinuclei content in cosmic ray

On the angular distribution of extensive air showers

Angular distributions of extensive air showers with different number of charged particles in the range 2.5x10^5--4x10^7 are derived using the experimental data obtained with the EAS MSU array. Possible approximations of the obtained distributions with different empiric functions available in literature, are analysed. It is shown that the exponential function provides the best approximation of the angular distributions in the sense of the chi-squared criterion.Comment: 5 pages including 1 figur

Pharmacokinetic studies derived indole SS-68 with antiarrhythmic and antianginal properties

A method of quantitative determination of SS-68 derivative of indole in rabbit blood plasma by high performance liquid chromatography with tandem mass spectrometric detector (HPLCMS/ MS). Conducted pharmacokinetic studies SS-68 in the body of rabbits. Set the main pharmacokinetic parameters of the substance that allow you to optimize the future use of it’s as a potential drug in cardiology practic

The Geometry and Moduli of K3 Surfaces

These notes will give an introduction to the theory of K3 surfaces. We begin with some general results on K3 surfaces, including the construction of their moduli space and some of its properties. We then move on to focus on the theory of polarized K3 surfaces, studying their moduli, degenerations and the compactification problem. This theory is then further enhanced to a discussion of lattice polarized K3 surfaces, which provide a rich source of explicit examples, including a large class of lattice polarizations coming from elliptic fibrations. Finally, we conclude by discussing the ample and Kahler cones of K3 surfaces, and give some of their applications.Comment: 34 pages, 2 figures. (R. Laza, M. Schutt and N. Yui, eds.

RARE CASE OF ENDOGENOUS FAMILY HYPERCORTICISM (CLINICAL CASE)

We described a case of an endogenous hypercorticism in 18-years old patient with Itsenko - Cushing syndrome which was caused by a hormonally active adrenal tumor of the left adrenal gland. In a clinical picture of a disease the following symptoms dominated: arterial hypertension, increase in body weight, adiposity of the trunk, hands, neck, face, strips of extensions of skin on femurs. We found multiple nevus pigmentosus of black, yellowy-brown color from 1.5 to 10 mm on lips and mucous of a mouth, skin of a face and a trunk. The hormonal research established violations of a circadian rhythm of a hydrocortisone, increase in the free hydrocortisone of blood to 749.0 nmol/24 h (reference range 123.0-626.0), urine to 1314.0 nmol/24 h (reference range 60.0-413.0). The ACTH level decreased to 1.7 pg/ml (reference range 7.0-66.0). The negative result of the night overwhelming test with Dexamethazonum is received. Muitislice CT of adrenal glands revealed signs of a nodular hyperplasia of the left-hand adrenal gland. The laparoscopic adrenalectomy is made at the left. Pathoanathomical conclusion: a nodular pigmental hyperplasia of a glomerular and fascicular zone of bark of an adrenal gland with inclusion of a miyelolipomatoz. In the nodular corticocytes inclusions of lipofuscin granules were found. In the postoperative period symptoms of a hypercorticoidism regressed, throughout two years of observation there is no recurrence. Monitoring of hormones of blood in six months: hydrocortisone 359.5 nmol/l, ACTH 7.02 pg/ml. Retrospectively, the patient displays an infrequent heritable disease - Carney complex. The patient's mother at the age of 32 years underwent left-side adrenalectomy concerning Itsenko - Cushing disease with morphological confirmation of a nodular pigmental hyperplasia in adrenal gland. In both cases clinical convalescence occurred. Interest of the presented observation consists in its exclusive rarity. The unilateral adrenalectomy was efficient, but the probability of a recurrence of a hypercorticoidism and other manifestations of Carney complex remains

The multilevel trigger system of the DIRAC experiment

The multilevel trigger system of the DIRAC experiment at CERN is presented. It includes a fast first level trigger as well as various trigger processors to select events with a pair of pions having a low relative momentum typical of the physical process under study. One of these processors employs the drift chamber data, another one is based on a neural network algorithm and the others use various hit-map detector correlations. Two versions of the trigger system used at different stages of the experiment are described. The complete system reduces the event rate by a factor of 1000, with efficiency $\geq$95% of detecting the events in the relative momentum range of interest.Comment: 21 pages, 11 figure

Biological preparations with different mechanisms of action for protecting potato against fungal diseases

Mycological analysis throughout the vegetation period of potato (Solanum tuberosum) made it possible to study in detail the structure of the micromycete community, to determine typical dominant (frequency, more than 60%), typical common (frequency, 30 to 60%), typical rare (frequency, 10 to 30%), and casual (frequency, less than 10%) species and to estimate changes in the microorganism community caused by plant protection preparations with different mechanisms of action. It was shown that, as a result of occurrence of resistant forms, synthetic preparations against fungal pathogens of potato (such as TMTD, Ridomil gold MC, and Cupricol) were only slightly more effective than biological preparations (Trichodermin and AgroChit), with the former considerably changing the natural saprophytic mycological community. An increase in the soil pool of Trichoderma harzianum as a result of application of a biological preparation based on this antagonistic fungus correlated with its effectiveness against the soil pathogen Fusarium sp., which causes root rot. A chitosan-based elicitor preparation more effectively suppressed the development of early (Alternaria sp. and Macrosporium sp.) and late (Phytophthora sp.) blighting of leaves and had a weaker effect on soil microflora. © MAIK "Nauka/Interperiodica", 2006

Observation of inverse diproton photodisintegration at intermediate energies

The reaction pp->{pp}_s\gamma, where {pp}_s is a proton pair with an excitation energy E_{pp}<3 MeV, has been observed with the ANKE spectrometer at COSY-Juelich for proton beam energies of T_p=0.353, 0.500, and 0.550 GeV. This is equivalent to photodisintegration of a free 1S_0 diproton for photon energies E\gamma ~ T_p/2. The differential cross sections measured for c.m. angles 0 deg.<\theta_{pp}<20 deg. exhibit a steep increase with angle that is compatible with E1 and E2 multipole contributions. The ratio of the measured cross sections to those of np->d\gamma is on the 10^{-3}-10^{-2} level. The increase of the pp->{pp}_s\gamma cross section with T_p might reflect the influence of the Delta(1232) excitation.Comment: 4 pages + 4 figure